Analysis Of Effect Of Aelian Soil Self-healing On The Dynamical Property Under Freeze-thaw

All kinds of basic physical indexes are gained through density,water ratio,specific density,particle-size analysis and so on. The fine particles is main component, it has the property of frosting heave.Through reading a large number of documents and combined with the freeze-thaw test, summarizes on the basis of predecessors to freeze and melt, observes ompletely freeze-thaw soils by the electron microscope, the structure change significantly after the first freeze-thaw, soil pore greaten,soil structure become loose, the structure change tiny circulation after2to5times, in the subsequent freeze-thaw cycles, the internal structure of the gap smaller, the soil reinforced, and produce new healing. Every time after thawing, soil will change, with the increase of cycling times, more and more small change. In17-to22times, its change stable, the structure is similar to not freeze-thawIn considering only freez-thaw condition, through the DDS-70three triaxial test machine for after freezing and thawing cycles of aeolian soil in the dynamic strength and modulus test, analysis of test results, the soil structure similar to that of its kinetic parameters similar to that of frozen soil, summarize the self-healing properties on kinetic parameters of influence, attain the following conclusion:1. The dynamic strength decrease after the first freeze-thaw cycle. As the number of freeze-thaw cycles increases, the dynamic strength is stable up to7times, beginning to rise, and the higher the confining pressure rising rate faster, there is little difference between the0and22times.2. The first freeze-thaw cycle affects greatly on soil sample maximum modulus, reduce the ampoitude is the largest. After the freeze-thaw cycles increases, dynamic elastic modulus begin to increase, just start its range is not too much, the rate begin to improve after5times, it is stable in17to22times, and maximum modulus is losed to0time freeze-thaw.